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Old 02-26-2016, 05:01 PM   #15
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Originally Posted by dix39 View Post
My 1994 P30 manual identifies the electric fan as an "auxiliary cooling fan". According to the manual it is there to provide additional cooling at low speed operations and for AC, but also according to the manual it only operates when the ignition is on and is triggered by a coolant temperature sensor. My interpretation would be that the thing comes on anytime additional cooling is needed at any speed, which is what others have already said.

I'm in a straight up learning curve with ours as we've only had it a few months and I'm trying to get it ready for a 8k mile trip this Summer. As with every vehicle I've had I bought a factory shop manual for it which has helped a lot.

Best of luck with yours!

I have a 95 with the same P37 Chassis. It says the fan is for cooling at low speeds when A/C unit is on for additional cooling. I have not looked for the sensor but will do so shortly. I have it wired manual for when I am sitting and the temp starts to climb. when I start moving again I turn it off.

1996 Damon DayBreak 454 P37 Chassis
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Old 02-27-2016, 02:28 PM   #16
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On my 1990 GB it has 2 factory installed electric fans, They both come on at the same time. They are hooked up to through a relay which is tied to a switch on the A/C unit. Once the temp gets high enough the switch on the A/C unit goes to ground which then grounds the relay and turns on the electric fans. A while back I added manual switches on the dash to turn them on from inside. all it does is run the relay to ground and the fans come on. I never have seen the electric fans make and difference in cooling while going down the road, so I believe it is to add cooling for the A/C unit when idling.

1990 28' Georgie Boy, 454, 4bbl, Thorley Headers, Recurved Distributor, 8.75 mpg. RVM 76
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Old 02-29-2016, 08:12 PM   #17
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My 1993 Bounder 454 came new with a clutch fan and two electric fans. I never use the dash air conditioning, but the electric fans will still cycle on and off.
Kevin n Chriss
2015 Newmar 3103 Bay Star -The Pay Car-
1993 Fleetwood 28T Bounder -The Flounder-
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Old 02-29-2016, 08:22 PM   #18
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1988 P30 Chevrolet Motorhome Chassis repair Manual | Free Online Auto Repair Manuals Download
1996 Damon DayBreak 454 P37 Chassis
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Old 02-29-2016, 08:32 PM   #19
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AtekorS, as you can see, many GM RVs had electric fans in addition to the belt driven fan. The telling thing about them is they generally seem controlled by a thermal switch. None reported that they come on with the ignition switch, some with the air conditioner. They should not be running as you engage the starter. You'll have to trace the wiring and see if you have a previous owner modification or a bad thermal switch.


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454, ace, pace arrow

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